Improvement in plugging-instruments for the teeth



UNrrnn STATES PATENT @Finca BARNABAS woon, on ALBANY, New Yoan.

IMPRQVEMENT |N PLUGG|NG-|NSTRUMNTS Foa THE TVEETH.

Specification forming part of Letters Patent No. 46,602, dated' February 28, 1865.

To all whom it may concern,.- 4 -Be it known that I, BARNABAS Woon, of Albany, in the county of Albany, in the State of New York, have invented a new and useful Instrument for Filling Teeth; and I do hereby declare that the following -is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

This instrument is designed for applying the fusible metal filling known as Woods Fusible Metal or Plastic Metallic Filling, the object being to provide an instrument, otherwise suitable, which shall be able to receive readily a due amount of caloric, in quantity rather than intensity, convey it readily to the material to be manipulated, and retain as long as practicable the temperature requisite for manipulating. A reference to the nature of the said fusible metal and the manner of working with it, as described in my specification relating to the same, under date of 18th February, 1864, will indicate the importance of this. Hence, the part ofthe instrument designed for receiving the heat and conveying it to the material should have considerable capacity for and be a good conductor of heat, while the sha-ft or support should be the reverse.

My invention consists in so constructing and combining these parts as that the essential requisites in this respect and others are practically attained and in a simplev and economical manner. This I effect, first, by forming a head or bit of metal with a bulb thereon between the beak or blade and the neck, the beak or blade, which may be of various forms and sizes suited to different cases, projecting sufficient-ly beyond the bulb to reach the desired places, and the neck being extended sufficient for attachment to a support or shaft; and, second, by combining this head or bit with a tubular shaft for its support, as herein described.

The head of the instrument, including the bulb, may be of silver, German silver, bronze, or other hard metal or alloy that is a good conductor of heat. The tubular shaft may be of metal the same as that of which the head is made, or of a different metal, having a lower conducting power or otherwise preferable, being made as thin as is consistent with strength 5 or it may be of glass, porcelain, or

other non-conductor of heat; or it may be a combination of the two, using, for example, a

metal tube as thin as desired to diminish conduction, and having this inlaid, cased, or enameled with a poor conductor.

As an insulator for the protection of the lips when the tubular shaft is of metal, I incase the 4shaft with simply a glass tube, as shown by the drawings, which also serves as an additional support.

The head of the instrument is affixed into the shaft, according to circumstances, b v means of av solder, or a luting, or any cement that will bear the heat to which it is subjected. Water-glass answers well by itself, 0r mixed with ground silex; als), zincwhiie calcined and mixed up into a paste with a solution "of chloride of zinc affords a good luting for the purpose.

I most commonly make the heads of German silver. For one style of the instrument I use tubes made of glass, aftixing the heads thereto by means of either of the abovenamed lutings. For another style I use thin tubes made of German silver from one to two inches in length, and about one-tenth of an inch, more or less, in diameter. Solder the heads to them and set them, with or without a glass casing, into ordinary handles. Sometimes I use larger metal tubeswith glass tubes secured therein, aftixin g the head thereto with cement.

I will now describe the several parts of my the proper temperature over the iiame of a Y spirit-lamp, or otherwise, and the blade cr point is then applied to a piece of the metal, which will soften under it and cling to it so that it may be carried to the cavity and molded therein; or the pieces may be rst placed into the cavity and then fused down with the heated instrument, in either case adding piece after piece until the work is complete', as further des'crribed in my speciticationof an improvement on fusible metal for filling teeth February 18, 1864.

What I claim as my invention, and desire to-secure by Letters Patent, isp 1. The herein-described instrument, consisting of a metallic-head, as described, affixed to a tubular shaft, whether of metal or other material, for an instrument for lling teeth with the herein-mentioned fusible metal filling or other similar material.

V2. The construction of the head A with a bulb, blade, and neck, as represented.

3. The formation of the bulb'b between the blade a and the neck c. l

4. The combination of the head A and tubular shaft Bor E.

5. The application of the insulating tubular casing D to the tubular shaft B.

In testimony whereof I hereunto Vset my nameand seal this 17th day of September,

' BARNABA'S Woon, [1.. s.]

Witnesses z" WM. TAYLOR,

...- HENRY MCBRIDE. 

